Mandelbrot set: Difference between revisions
added vala
m (→{{header|MiniScript}}: added "works with" and fixed formatting of output) |
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</pre>
=={{header|Vala}}==
<syntaxhighlight lang="vala">public class Example: Gtk.Application {
private Gtk.ApplicationWindow window;
private Gtk.DrawingArea drawing_area;
public Example() {
Object(application_id: "my.application", flags: ApplicationFlags.FLAGS_NONE);
this.activate.connect(() => {
window = new Gtk.ApplicationWindow(this);
drawing_area = new Gtk.DrawingArea();
drawing_area.set_draw_func(draw_mandelbrot);
window.set_child(drawing_area);
window.present();
});
}
private void draw_mandelbrot(Gtk.DrawingArea area, Cairo.Context cr, int width, int height) {
cr.set_source_rgb(0, 0, 0);
cr.paint();
int x0 = -1;
double x_increment = 2.47 / (float) width;
double y_increment = 2.24 / (float) height;
for (double x = -2.0; x < 0.47; x += x_increment, x0++) {
int y0 = -1;
for (double y = -1.12; y < 1.12; y += y_increment, y0++) {
double c_re = x;
double c_im = y;
double x_ = 0,
y_ = 0;
int iterations = 0;
int max_iterations = 50;
while (iterations < max_iterations && x_ * x_ + y_ * y_ <= 4.0) {
double x_new = x_ * x_ - y_ * y_ + c_re;
y_ = 2.0 * x_ * y_ + c_im;
x_ = x_new;
iterations++;
}
if (iterations < max_iterations) {
cr.set_source_rgb((float) iterations / (float) max_iterations, 0, 0);
cr.rectangle(x0, y0, 1, 1);
cr.fill();
}
}
}
}
public static int main(string[] argv) {
var app = new Example();
return app.run(argv);
}
}</syntaxhighlight>
=={{header|VBScript}}==
<syntaxhighlight lang="vb">
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